Open-Silicon, a Milpitas, Calif. chip design company, said it has raised $10 million in a fourth round of funding led by venture capital fund Bridgescale Partners.

Previous investors Norwest Venture Partners, Sequoia Capital, InterWest Partners, and Artis Capital Management also participated in this round.

Thus continues a remarkable run of co-investing between Sequoia and Artis, a hedge fund that employs the son of a Sequoia partner.

The statement is here.